Recent questions tagged physical-chemistry

A semipermeable membrane used in the measurement of osmotic pressure of a solution allows the passage of

asked Jul 18, 2014 by sreemathi.v

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Raoult's law is obeyed by each constituent of a binary liquid solution when

asked Jul 18, 2014 by sreemathi.v

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A binary liquid solution of chloroform and acetone is prepared.Which of the following statements correctly represents the behaviour of this liquid solution?

asked Jul 17, 2014 by sreemathi.v

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A binary liquid solution of n-heptane and ethyl alcohol is prepared.Which of the following statements correctly represents the behaviour of this liquid solution?

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,the molar mass of solute evaluated from the osmotic pressure measurement is given as

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,the molar mass of solute evaluated from the elevation of boiling point is given by the expression

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution containing a nonvolatile solute,which of the following expressions correctly represents the molar mass of solute ?

asked Jul 17, 2014 by sreemathi.v

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For an ideal solution containing a nonvolatile solute,which of the following expressions is correctly represented?

asked Jul 17, 2014 by sreemathi.v

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For an ideal binary liquid solution with $p_A^* > p_B^*$,which of the following relations between $x_A$ (mole fraction of A in liquid phase) and $y_A$ (mole fraction of A in vapour phase) is correctly represented?

asked Jul 17, 2014 by sreemathi.v

1 answer

For an ideal solution containing a nonvolatile solute,which of the following expressions is correctly represented?

asked Jul 17, 2014 by sreemathi.v

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For an ideal solution containing a nonvolatile solute,which of the following expressions is correctly represented?

asked Jul 17, 2014 by sreemathi.v

1 answer

For an ideal solution containing a nonvolatile solute,which of the following expressions represents the vapour pressure of the solution?(where the subscripts 1 and 2 stand for solvent and solute, respectively)

asked Jul 17, 2014 by sreemathi.v

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The plot of $1/x_A$ versus $1/y_A$ (where $x_A$ and $y_A$ are the mole fractions of A in liquid and vapour phases,respectively) is linear with slope and intercept respectively are given as

asked Jul 17, 2014 by sreemathi.v

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Which of the following plots correctly represents the behaviour of an ideal binary liquid solution?

asked Jul 17, 2014 by sreemathi.v

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Which of the following plots represents the behaviour of an ideal binary liquid solution ?

asked Jul 17, 2014 by sreemathi.v

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Which of the following plots does not represent the behaviour of an ideal binary liquid solution?

asked Jul 17, 2014 by sreemathi.v

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For a binary ideal liquid solution,the total pressure of the solution is given as

asked Jul 17, 2014 by sreemathi.v

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The expression relating mole fraction of solute $(x_2)$ and molarity $(M)$ of the solution is (where $\rho$ is the density of solution,$M_1$ and $M_2$ are the molar masses of solvent and solute,respectively)

asked Jul 17, 2014 by sreemathi.v

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The expression relating molality (m) and mole fraction of solute $(x_2)$ in a solution is (where $M_1$ is the molar mass of solvent)

asked Jul 17, 2014 by sreemathi.v

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The expression relating molarity (M) and molality (m) of a solution is (where $\rho$ is the density of solution and $M_2$ is the molar mass of solute)

asked Jul 17, 2014 by sreemathi.v

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The freezing point of equimolal aqueous solutions will be highest for

asked Jul 17, 2014 by sreemathi.v

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Which of the following 0.1M aqueous solutions will have the lowest freezing point?

asked Jul 17, 2014 by sreemathi.v

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In which mode of expression the concentration of a solution remains independent of temperature ?

asked Jul 17, 2014 by sreemathi.v

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When mercuric iodide is added to an aqueous solution of pottassium iodide the

asked Jul 17, 2014 by sreemathi.v

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For a dilute solution,Raoult's law states that

asked Jul 17, 2014 by sreemathi.v

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An azeotropic solution of two liquid s has a boiling point lower than either of them when it

asked Jul 17, 2014 by sreemathi.v

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The expression relating molarity (M) and molality (m) or a solution is:

asked Jul 15, 2014 by balaji.thirumalai

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pi bond is formed,

asked Apr 7, 2014 by meena.p

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The type of bonds present in $CuSO_4.5H_2O$ are only

asked Apr 7, 2014 by meena.p

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An atom of one element A has four electrons in its outermost shell, and that of B has six electrons in the outermost shell. The formula of the compound formed by these two will be

asked Apr 7, 2014 by meena.p

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Among $CaH_2,NH_3,NaH$ and $B_2 H_6$ which are covalent hydride ?

asked Apr 7, 2014 by meena.p

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Among the following which has the most polar character.

asked Apr 4, 2014 by meena.p

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A section of the periodic table is given below elements A , B and X, Y in two groups. Which of the bonds given below is the least polar.

asked Apr 4, 2014 by meena.p

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p- bonding occurs in each of the following except

asked Apr 4, 2014 by meena.p

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The enolic form of acetone contains

asked Apr 4, 2014 by meena.p

1 answer

If the reaction rate at a given temperature becomes slower. then

asked Apr 4, 2014 by meena.p

2 answers

Rate of a chemical reaction can be kept constant by

asked Apr 4, 2014 by meena.p

1 answer

The rate of a gaseous reaction is given by the expression $k[A][B]$. If the volume of the reaction vessel is suddenly reduced to $ \large\frac{1}{4}$ th of the initial volume , the reaction rate relating to original rate will be

asked Apr 4, 2014 by meena.p

1 answer

Diazonium salt decomposes as $ C_6H_5N^{+}_2CL^{-} \longrightarrow C_6H_5Cl+N_2$

asked Apr 4, 2014 by meena.p

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The minimum energy required for molecules to enter into chemical reaction is called

asked Apr 4, 2014 by meena.p

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The molecularity of the reaction $6FeSO_4+3H_2SO_4+KClO_3 \longrightarrow KCl +3 Fe_2(SO_4)_3+3H_2O$ is

asked Apr 4, 2014 by meena.p

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$N_2$ and $O_2$ are converted into monoanions $N_2^{-}$ and $O_2^{-}$ respectively which of the following statem is wrong ?

asked Apr 4, 2014 by meena.p

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Bond order of $N-O$ bonds in nitrate ions is :

asked Apr 4, 2014 by meena.p

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The dipole moment of $KCl$ is $3.336 \times 10^{-29}$ coulomb meter which indicates that it is a highly polar molecule. The inter atomic distance between $K^+$ and $Cl^{-}$ in this molecule is $2.6 \times 10^{-10}\;m$ Calculate the dipole moment of $KCl$ molecular if there were opposite charges of one fundamental unit located at each nucleus. Calculate percentage ionic character of $KCl$

asked Apr 4, 2014 by meena.p

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calculate the lattice energy of $KI,$ given that enthalphy of (i) sublimation of K is $90\;K\;J mol^{-1}$, (ii) dissociation of $I_2$ to $I^{-}$ is $213\;kJmol^{-1}$ (iii) ionisation of K to $K^{+}$ is $415\;kJ mol^{-1}$ (iv) electron affinity for I to $I^{-}$ is $-294.6 \;KJ\;mol^{-1}$ and $SH_f$ overall is $-327\;kJ\;mol^{-1}$

asked Apr 4, 2014 by meena.p

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The experimental dipole moment of water molecule is $1.84\;D$ . Calculate the bond angle $H-O-H$ in water molecule , if dipole moment of OH bond is $1.5\;D$

asked Apr 4, 2014 by meena.p

1 answer

A diatomic molecule has a dipole moment equal to $1.2 \;D$ , If bond length is $1.0\;a^{\circ}$ What fraction of electronic charge 'e' exists on each atom ?

asked Apr 4, 2014 by meena.p

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Which of the following are isoelectronic and isostructural ? $NO_3^{-},CO_3^{2-}, ClO_3^{-},SO_3$

asked Apr 4, 2014 by meena.p

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A square planar complex is formed by hybridisation of which atomic orbitals ?

asked Apr 4, 2014 by meena.p

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Identify the least stable ion amongst the following :

asked Apr 4, 2014 by meena.p

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